JP6781863B1 - New carbamic acid ester compound and acrylic rubber composition containing it - Google Patents

New carbamic acid ester compound and acrylic rubber composition containing it Download PDF

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JP6781863B1
JP6781863B1 JP2020535273A JP2020535273A JP6781863B1 JP 6781863 B1 JP6781863 B1 JP 6781863B1 JP 2020535273 A JP2020535273 A JP 2020535273A JP 2020535273 A JP2020535273 A JP 2020535273A JP 6781863 B1 JP6781863 B1 JP 6781863B1
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acrylic rubber
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洋一郎 富川
洋一郎 富川
智 齋藤
智 齋藤
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Abstract

一般式Z-OCONH(CH2)nNHCOO-Z 〔I〕ここで、Zは下記〔i〕、〔ii〕または〔iii〕であり、nは2〜10の整数である(ここで、R1およびR2はそれぞれ独立に炭素数1〜5の低級アルキル基であり、R3は水素原子または炭素数1〜5の低級アルキル基であり、aは1または2である)で表わされるカルバミン酸エステル化合物。このカルバミン酸エステル化合物は、カルボキシル基含有アクリルゴムの加硫剤として用いられ、スコーチ抑制による加硫速度の遅延を改善する。General formula Z-OCONH (CH2) nNHCOO-Z [I] where Z is the following [i], [ii] or [iii], and n is an integer from 2 to 10 (where R1 and R2). Are independently lower alkyl groups with 1 to 5 carbon atoms, R3 is a hydrogen atom or lower alkyl group with 1 to 5 carbon atoms, and a is 1 or 2). This carbamic acid ester compound is used as a vulcanizing agent for carboxyl group-containing acrylic rubber, and improves the delay in vulcanization rate due to scorch suppression.

Description

本発明は、新規カルバミン酸エステル化合物およびそれを含有するアクリルゴム組成物に関する。さらに詳しくは、カルボキシル基含有アクリルゴム用の新規加硫剤として用いられるカルバミン酸エステル化合物およびそれを含有するアクリルゴム組成物に関する。 The present invention relates to a novel carbamic acid ester compound and an acrylic rubber composition containing the same. More specifically, the present invention relates to a carbamic acid ester compound used as a novel vulcanizing agent for a carboxyl group-containing acrylic rubber, and an acrylic rubber composition containing the same.

カルボキシル基含有アクリルゴムは、アクリルゴムの中でも特に耐熱性、耐圧縮永久歪特性にすぐれ、かつ金属への非腐食性、環境への配慮などがなされたハロゲン非含有アクリルゴムであるため、近年ホース、シール材用途等への需要が増えている。しかしながら、加硫速度に対してスコーチタイムが短く、すなわち加硫速度を速くすればスコーチタイムが短すぎ、加硫速度を遅くすればスコーチタイムは長くなるという傾向を有している。 Carboxylic group-containing acrylic rubber is a halogen-free acrylic rubber that has excellent heat resistance, compression set resistance, non-corrosion to metals, and environmental friendliness among acrylic rubbers. , Demand for sealing materials is increasing. However, there is a tendency that the scorch time is short with respect to the vulcanization rate, that is, the scorch time is too short when the vulcanization rate is increased, and the scorch time is long when the vulcanization rate is decreased.

より具体的には、加硫速度を満足し得る速さにまで高めた場合、スコーチタイムが短く、生地流れの悪化を招き、成形不良となる。加硫速度を遅くした場合には、成形時間が長くなり、コストの上昇につながる。このことは、加硫速度が速く、スコーチタイムが長いという理想からいうと、成形性に劣るということになる。 More specifically, when the vulcanization rate is increased to a satisfactory rate, the scorch time is short, the dough flow is deteriorated, and molding is defective. If the vulcanization rate is slowed down, the molding time becomes long, which leads to an increase in cost. This means that the moldability is inferior in terms of the ideal that the vulcanization rate is high and the scorch time is long.

アクリルゴムの加硫成形方法としては、一般に型成形(射出成形、圧縮成形、トランスファー成形等)と押出成形とが用いられており、現在は成形時の加硫速度とスコーチタイムとのバランスをとるために、下記2つの加硫系の流れがある。
(1) 脂肪族ジアミン(加硫剤)/グアニジン(加硫促進剤)
(2) 芳香族ジアミン(加硫剤)/グアニジン(加硫促進剤)
Mold molding (injection molding, compression molding, transfer molding, etc.) and extrusion molding are generally used as vulcanization molding methods for acrylic rubber, and currently, the vulcanization rate at the time of molding and the scorch time are balanced. Therefore, there are the following two vulcanization system flows.
(1) Aliphatic diamine (vulcanization agent) / guanidine (vulcanization accelerator)
(2) Aromatic diamine (vulcanization agent) / guanidine (vulcanization accelerator)

主に加硫速度を優先する金型成形用途に用いられる脂肪族ジアミン加硫系は、主にスコーチタイム(t5:10分以上)を優先する押出成形用途の芳香族ジアミン加硫系よりも、加硫速度は速いがスコーチタイムが短く、一方脂肪族ジアミン加硫系よりもスコーチタイムが長い芳香族ジアミン加硫系(加硫剤としては4,4′-ジアミノジフェニルエーテル、2,2-ビス〔4-(4-アミノフェノキシ)フェニル〕プロパン、メチレンジアニリン等が用いられる)は、加硫速度が遅いといった欠点がみられる。したがって、高速加硫を可能とし、かつ非スコーチを両立することができる加硫系が望まれている。 The aliphatic diamine vulcanization system mainly used for mold molding where the vulcanization rate is prioritized is higher than the aromatic diamine vulcanization system for extrusion molding which mainly prioritizes scorch time (t5: 10 minutes or more). Aromatic diamine vulcanization system (4,4'-diaminodiphenyl ether, 2,2-bis [as a vulcanizing agent], which has a high vulcanization rate but a short scorch time, while has a longer scorch time than an aliphatic diamine vulcanization system. 4- (4-Aminophenoxy) phenyl] propane, methylenedianiline, etc.) has the drawback of slow vulcanization rate. Therefore, a vulcanization system that enables high-speed vulcanization and is compatible with non-scorch is desired.

ここで、脂肪族ジアミン加硫系の加硫機構について考えてみるに、脂肪族ジアミンとしてはヘキサメチレンジアミンカーバメート(6-アミノヘキシルカルバミン酸)H3N+(CH2)6NHCOO-がカルボキシル基含有アクリルゴムの加硫に広く用いられており、その加硫反応はこの加硫剤化合物に熱が適用されることで、ヘキサメチレンジアミンのアミノ基の保護基が100℃付近から熱分解脱炭酸してヘキサメチレンジアミンとなり、アクリルゴム中の架橋性官能基であるカルボキシル基等と反応して、加硫反応が進行するという形をとっている。このため、スコーチタイムが短い(スコーチ安定性に劣る)という欠点を有する。また、ヘキサメチレンジアミンを炭酸塩としている理由の一つは、ヘキサメチレンジアミンは吸湿性が強くかつ気化し易いため、取扱いが困難であることによる。 Here, considering the vulcanization mechanism of the aliphatic diamine vulcanization system, hexamethylene diamine carbamate (6-aminohexyl carbamate) H 3 N + (CH 2 ) 6 NHCOO - is a carboxyl group as the aliphatic diamine. It is widely used for vulcanization of contained acrylic rubber, and in the vulcanization reaction, heat is applied to this vulcanizing agent compound, and the protective group of the amino group of hexamethylenediamine is thermally decomposed and decarbonized from around 100 ° C. Then, it becomes hexamethylenediamine, which reacts with a carboxyl group or the like which is a crosslinkable functional group in acrylic rubber, and the vulcanization reaction proceeds. Therefore, it has a drawback that the scorch time is short (the scorch stability is inferior). Further, one of the reasons why hexamethylenediamine is used as a carbonate is that hexamethylenediamine is difficult to handle because it has strong hygroscopicity and is easily vaporized.

なお、カルボキシル基含有アクリルゴムとしては、カルボキシル基含有エチレンアクリルゴム(デュポン社製品ベーマックG)、特定のカルボキシル基含有アクリルゴム(電気化学工業製品電化ER)等も含まれ、これらのカルボキシル基含有アクリルゴムについてもスコーチタイムが短いという問題がみられる。なお、特許文献1〜10中には、加硫速度が速く、スコーチタイムも長くなるものもあるが、これらの場合には耐圧縮永久歪特性の低下を免れないものもある。 The carboxyl group-containing acrylic rubber includes a carboxyl group-containing ethylene acrylic rubber (DuPont product Bemac G), a specific carboxyl group-containing acrylic rubber (electrochemical industry product electrification ER), and the like, and these carboxyl group-containing acrylics. There is also a problem with rubber that the scorch time is short. In addition, in some of Patent Documents 1 to 10, the vulcanization rate is high and the scorch time is long, but in these cases, the compression set resistance is inevitably deteriorated.

また、本出願人の出願に係る特許文献11には、HMDA-Fmoc

Figure 0006781863
または HMDA-Dmoc
Figure 0006781863
等の一般式 R2(SO2)m(CH2)nOCONH-R1-NHCOO(CH2)n(SO2)mR2
R1:C1〜C20の2価脂肪族アルキレン基
2価脂環式シクロアルキレン基
2価芳香族基
R2:カーバメート構造としたとき、塩基性加硫促進剤の作
用で分解し、促進剤の作用で分解し、ジアミンを発生
し得る基
n:0、1または2
m:0または1
で表わされるジウレタン化合物が記載されているが、後記比較例10〜11に記載される如く、tc10およびtc90の値が十分短いとはいえず、またME(MH-ML)の値が十分大きいとはいえない。 Further, in Patent Document 11 relating to the application of the present applicant, HMDA-Fmoc
Figure 0006781863
Or HMDA-Dmoc
Figure 0006781863
General formulas such as R 2 (SO 2 ) m (CH 2 ) n OCONH-R 1 -NHCOO (CH 2 ) n (SO 2 ) m R 2
R 1 : Divalent aliphatic alkylene group from C 1 to C 20
Divalent alicyclic cycloalkylene group
Divalent aromatic group
R 2 : Production of basic vulcanization accelerator when it has a carbamate structure
Decomposes by the action of the accelerator and generates diamine
Possible group
n: 0, 1 or 2
m: 0 or 1
Although the diurethane compound represented by is described, as described in Comparative Examples 10 to 11 described later, it cannot be said that the values of tc10 and tc90 are sufficiently short, and the values of ME (MH-ML) are sufficiently large. I can't say.

特開平11−255997号公報JP-A-11-255997 特開平11−100478号公報Japanese Unexamined Patent Publication No. 11-100748 特開平11−140264号公報Japanese Unexamined Patent Publication No. 11-14024 WO 2005/103143WO 2005/103143 特開2001−181464号公報Japanese Unexamined Patent Publication No. 2001-181464 特開2001−316554号公報Japanese Unexamined Patent Publication No. 2001-316554 特開2003−342437号公報Japanese Unexamined Patent Publication No. 2003-342437 特開2002−317091号公報Japanese Unexamined Patent Publication No. 2002-317091 特開2004−269873号公報Japanese Unexamined Patent Publication No. 2004-269873 再表2003−4563号公報Re-table 2003-4563 Gazette WO 2009/096545WO 2009/0965545

本発明の目的は、架橋性基含有アクリルゴム用の新規加硫剤として用いられるジウレタン化合物およびそれを加硫剤として含有し、スコーチ抑制による加硫速度の遅延を改善し、すなわち脂肪族ジアミンの有する良好な加硫速度および芳香族ジアミンの有する良好なスコーチ安定性を両立せしめたアクリルゴム組成物を提供することにある。 An object of the present invention is to improve the delay of the vulcanization rate due to scorch suppression by containing a diurethane compound used as a novel vulcanizing agent for crosslinkable group-containing acrylic rubber and the vulcanizing agent, that is, an aliphatic diamine. It is an object of the present invention to provide an acrylic rubber composition having both a good vulcanization rate and a good scorch stability of an aromatic diamine.

本発明によって、一般式
Z-OCONH(CH2)nNHCOO-Z 〔I〕
ここで、Zは下記〔i〕、〔ii〕または〔iii〕であり、nは2〜10の整数である

Figure 0006781863
Figure 0006781863
Figure 0006781863
(ここで、R1およびR2はそれぞれ独立に炭素数1〜5の低級アルキル基であり、R3は水素原子または炭素数1〜5の低級アルキル基であり、aは1または2である)で表わされるカルバミン酸エステル化合物が提供される。 According to the present invention, the general formula
Z-OCONH (CH 2 ) n NHCOO-Z [I]
Where Z is the following [i], [ii] or [iii], and n is an integer from 2 to 10.
Figure 0006781863
Figure 0006781863
Figure 0006781863
(Here, R 1 and R 2 are independently lower alkyl groups with 1 to 5 carbon atoms, R 3 is a hydrogen atom or lower alkyl group with 1 to 5 carbon atoms, and a is 1 or 2. ) Is provided.

このカルバミン酸エステル化合物は、カルボキシル基含有アクリルゴムに加硫促進剤と共に配合され、アクリルゴム組成物を形成させる。 This carbamic acid ester compound is blended with a carboxyl group-containing acrylic rubber together with a vulcanization accelerator to form an acrylic rubber composition.

本発明に係る新規化合物であるカルバミン酸エステル化合物は、カルボキシル基含有アクリルゴムの加硫剤として好適であり、特にカルバミン酸エステル化合物および塩基性加硫促進剤を配合したカルボキシル基含有アクリルゴム組成物は、迅速な加硫速度および良好なスコーチ安定性を有し、従来のアミン加硫系では実現できなかった短時間射出成形などを可能とする。 The carbamic acid ester compound, which is a novel compound according to the present invention, is suitable as a vulcanizing agent for a carboxyl group-containing acrylic rubber, and in particular, a carboxyl group-containing acrylic rubber composition containing a carbamic acid ester compound and a basic vulcanization accelerator. Has a rapid vulcanization rate and good scorch stability, and enables short-time injection molding and the like, which could not be realized by a conventional amine vulcanization system.

また、スコーチの観点からみて、脂肪族ジアミン加硫系が使用できず芳香族ジアミン加硫系を使用していた押出成形用途の加硫成形においても、本発明のカルバミン酸エステル化合物との併用により、高速加硫(短時間加硫)および高温押出が可能となる。 Further, from the viewpoint of the scorch, even in the vulcanization molding for extrusion molding where the aliphatic diamine vulcanization system cannot be used and the aromatic diamine vulcanization system is used, the vulcanization molding for extrusion molding can be performed in combination with the carbamate ester compound of the present invention. , High speed vulcanization (short time vulcanization) and high temperature extrusion are possible.

このため、スコーチの抑制による加硫速度の遅延を改善することができ、射出成形時などに問題となっていたこの問題を解決することで、成形条件の設定範囲を広げることを可能としている。また、加硫物性、特に耐圧縮永久歪特性の大きな低下もみられない。その結果、射出成形、圧縮成形、トランスファー成形等の型成形のみならず、押出成形にも有効に適用することができ、オイルシール、ガスケット、Oリング等の各種シール類、ホース、ダイヤフラム、ロール、防振ゴム、工業用ゴム部品等の加硫成形に有効に用いることができる。 Therefore, it is possible to improve the delay of the vulcanization rate due to the suppression of the scorch, and by solving this problem which has been a problem at the time of injection molding, it is possible to expand the setting range of the molding conditions. In addition, there is no significant decrease in vulcanization properties, especially compression set resistance. As a result, it can be effectively applied not only to mold molding such as injection molding, compression molding and transfer molding, but also to extrusion molding, and various seals such as oil seals, gaskets and O-rings, hoses, diaphragms, rolls, etc. It can be effectively used for vulcanization molding of anti-vibration rubber, industrial rubber parts, etc.

一般式
Z-OCONH(CH2)nNHCOO-Z 〔I〕
ここでZは下記〔i〕、〔ii〕または〔iii〕であり、nは2〜10の整数、好ましくは6である。

Figure 0006781863
Figure 0006781863
Figure 0006781863
General formula
Z-OCONH (CH 2 ) n NHCOO-Z [I]
Here, Z is the following [i], [ii] or [iii], and n is an integer of 2 to 10, preferably 6.
Figure 0006781863
Figure 0006781863
Figure 0006781863

かかる置換基を有するカルバミン酸エステル化合物は、直鎖状アルキレンジイソシアネート ONC(CH2)nNCOと水酸基含有化合物であるインドリルメタノール、N-アルキル-2-ヒドロキシメチルピロールまたは一般式

Figure 0006781863
で表わされる水酸基含有フェニル化合物との反応によって容易に製造することができる。ここで、R1およびR2はそれぞれ独立に炭素数1〜5の低級アルキル基であり、R3は水素原子または炭素数1〜5の低級アルキル基であり、aは1または2である。 Carbamic acid ester compounds having such substituents include linear alkylene diisocyanate ONC (CH 2 ) n NCO and hydroxyl group containing compounds such as indolylmethanol, N-alkyl-2-hydroxymethylpyrrole or general formula.
Figure 0006781863
It can be easily produced by reacting with a hydroxyl group-containing phenyl compound represented by. Here, R 1 and R 2 are independently lower alkyl groups having 1 to 5 carbon atoms, R 3 is a hydrogen atom or a lower alkyl group having 1 to 5 carbon atoms, and a is 1 or 2.

具体的には、次のような反応によって製造される。

Figure 0006781863
Figure 0006781863
Figure 0006781863
Specifically, it is produced by the following reaction.
Figure 0006781863
Figure 0006781863
Figure 0006781863

カルバミン酸エステル化合物および水酸基含有化合物とは、トルエン、ジオキサン、メチルエチルケトン等の有機溶媒中で約10〜120℃で反応させた後、不溶部をろ別することにより、それの製造が行われる。 The carbamic acid ester compound and the hydroxyl group-containing compound are produced by reacting them in an organic solvent such as toluene, dioxane, or methyl ethyl ketone at about 10 to 120 ° C., and then filtering the insoluble portion.

かかる反応は、ウレタン硬化触媒存在下で行うこともできる。ウレタン硬化触媒としては、有機スズ化合物、有機チタン化合物、有機ジルコニウム化合物または有機アミン化合物が挙げられ、有機アミン化合物と有機スズ化合物を併用することもでき、これらは直鎖状アルキレンジイソシアネート100重量部に対して約0.1〜10重量部の割合で用いられる。 Such a reaction can also be carried out in the presence of a urethane curing catalyst. Examples of the urethane curing catalyst include an organic tin compound, an organic titanium compound, an organic zirconium compound or an organic amine compound, and an organic amine compound and an organic tin compound can be used in combination, and these are 100 parts by weight of a linear alkylene diisocyanate. On the other hand, it is used at a ratio of about 0.1 to 10 parts by weight.

ウレタン硬化触媒として用いられる有機スズ化合物としては、例えばジラウリン酸ジブチルスズ、ビス(2-エチルヘキサン酸)スズ、ジブチルスズビス(2,4-ペンタンジオネート)等が、有機チタン化合物としては、例えばチタンジイソプロポキシビス(エチルアセトアセテート)等が、有機ジルコニウム化合物としては、例えばジルコニウムジブトキシビス(エチルアセトアセテート)、ジルコニウムテトラ(アセチルアセトネート)等が挙げられる。 Examples of the organic tin compound used as the urethane curing catalyst include dibutyltin dilaurate, bis (2-ethylhexanoic acid) tin, and dibutyltin bis (2,4-pentandionate), and examples of the organic titanium compound include titanium di. Isopropoxybis (ethylacetoacetate) and the like, and examples of the organic zirconium compound include zirconium dibutoxybis (ethylacetacetate) and zirconium tetra (acetylacetonate).

また、有機アミン化合物としては、トリエチレンジアミン、ビス(ジメチルアミノエチル)エーテル、1,4-ジアザビシクロ[2.2.2]オクタン、ペンタメチルジエチレントリアミン、N,N-ジメチルシクロヘキシルアミン、N-メチルジシクロヘキシルアミン、N,N,N,N-テトラメチルプロピレンジアミン、N,N,N,N-テトラメチルヘキサメチレンジアミン、N-メチルモルホリン、N-エチルモルホリン、N,N-ジメチルエタノールアミン、N,N-ジエチルエタノールアミン、1,8-ジアザビシクロ[5.4.0]ウンデセン-7またはその有機酸塩、1,5-ジアザビシクロ[4.3.0]ノネン-5等が挙げられる。1,8-ジアザビシクロ[5.4.0]ウンデセン-7の有機酸塩としては、例えば1,8-ジアザビシクロ[5.4.0]ウンデセン-7のギ酸塩、2-エチルヘキサン塩、フェノール塩、オクチル酸塩、p−トルエンスルホン酸塩、o-フタル酸塩等が挙げられる。 Examples of the organic amine compound include triethylenediamine, bis (dimethylaminoethyl) ether, 1,4-diazabicyclo [2.2.2] octane, pentamethyldiethylenetriamine, N, N-dimethylcyclohexylamine, N-methyldicyclohexylamine, and N. , N, N, N-tetramethylpropylenediamine, N, N, N, N-tetramethylhexamethylenediamine, N-methylmorpholine, N-ethylmorpholine, N, N-dimethylethanolamine, N, N-diethylethanol Amine, 1,8-diazabicyclo [5.4.0] undecene-7 or an organic acid salt thereof, 1,5-diazabicyclo [4.3.0] nonen-5 and the like can be mentioned. Examples of the organic acid salt of 1,8-diazabicyclo [5.4.0] undecene-7 include formate of 1,8-diazabicyclo [5.4.0] undecene-7, 2-ethylhexane salt, phenol salt, and octylate. , P-Toluenesulfonate, o-phthalate and the like.

得られたカルバミン酸エステル化合物は、カルボキシル基含有アクリルゴムに加硫剤として配合され、アクリルゴム組成物を形成させる。 The obtained carbamic acid ester compound is blended with a carboxyl group-containing acrylic rubber as a vulcanizing agent to form an acrylic rubber composition.

カルボキシル基含有アクリルゴムとしては、炭素数1〜8のアルキル基を有するアルキルアクリレートおよび炭素数2〜8のアルコキシアルキル基を有するアルコキシアルキルアクリレートの少くとも1種類とカルボキシル基含有不飽和化合物とを共重合させたものが用いられる。 The carboxyl group-containing acrylic rubber includes at least one type of alkyl acrylate having an alkyl group having 1 to 8 carbon atoms and an alkoxyalkyl acrylate having an alkoxyalkyl group having 2 to 8 carbon atoms, and a carboxyl group-containing unsaturated compound. A polymerized product is used.

アルキルアクリレートとしては、例えばメチルアクリレート、エチルアクリレート、プロピルアクリレート、イソプロピルアクリレート、n-ブチルアクリレート、n-ヘキシルアクリレート、2-エチルヘキシルアクリレート、n-オクチルアクリレートおよびこれらに対応するメタクリレートが用いられる。一般的に、アルキル基の鎖長が長くなると耐寒性の点では有利となるが、耐油性では不利となり、鎖長が短いとその逆の傾向がみられ、耐油性、耐寒性のバランス上からはエチルアクリレート、n-ブチルアクリレートが好んで用いられる。 As the alkyl acrylate, for example, methyl acrylate, ethyl acrylate, propyl acrylate, isopropyl acrylate, n-butyl acrylate, n-hexyl acrylate, 2-ethylhexyl acrylate, n-octyl acrylate and the corresponding methacrylate are used. In general, a long chain length of an alkyl group is advantageous in terms of cold resistance, but it is disadvantageous in oil resistance, and a short chain length shows the opposite tendency, from the viewpoint of the balance between oil resistance and cold resistance. Ethyl acrylate and n-butyl acrylate are preferably used.

また、アルコキシアルキルアクリレートとしては、例えばメトキシメチルアクリレート、2-メトキシエチルアクリレート、2-エトキシエチルアクリレート、2-n-ブトキシエチルアクリレート、3-エトキシプロピルアクリレート等が用いられ、好ましくは2-メトキシエチルアクリレート、2-エトキシエチルアクリレートが用いられる。アルコキシアルキルアクリレートとアルキルアクリレートとは、それぞれ単独でも用いられるが、好ましくは前者が約60〜0重量%、また後者が約40〜100重量%の割合で用いられ、アルコキシアルキルアクリレートを共重合させた場合には耐油性と耐寒性のバランスが良好となり、ただしこれよりも多い割合で共重合させると常態物性と耐熱性が低下する傾向がみられるようになる。 As the alkoxyalkyl acrylate, for example, methoxymethyl acrylate, 2-methoxyethyl acrylate, 2-ethoxyethyl acrylate, 2-n-butoxyethyl acrylate, 3-ethoxypropyl acrylate and the like are used, and 2-methoxyethyl acrylate is preferable. , 2-ethoxyethyl acrylate is used. The alkoxyalkyl acrylate and the alkyl acrylate can be used alone, but preferably the former is used in a proportion of about 60 to 0% by weight and the latter is used in a proportion of about 40 to 100% by weight, and the alkoxyalkyl acrylate is copolymerized. In some cases, the balance between oil resistance and cold resistance is good, but if copolymerization is carried out at a higher ratio than this, the normal physical properties and heat resistance tend to decrease.

カルボキシル基含有不飽和化合物としては、マレイン酸またはフマル酸のメチル、エチル、プロピル、イソプロピル、n-ブチル、イソブチル等のモノアルキルエステル、イタコン酸またはシトラコン酸のメチル、エチル、プロピル、イソプロピル、n-ブチル、イソブチル等のモノアルキルエステル等が挙げられ、好ましくはマレイン酸モノn-ブチルエステル、フマル酸モノエチルエステル、フマル酸モノn-ブチルエステルが用いられる。これらのカルボキシル基含有不飽和化合物は、カルボキシル基含有アクリルエラストマー中約0.5〜10重量%、好ましくは約1〜7重量%を占めるような共重合割合で用いられ、これよりも少ない共重合割合では加硫が不十分となって圧縮永久歪値が悪化し、一方これよりも共重合割合を多くするとスコーチし易くなる。なお、共重合反応は、重合転化率が90%以上となるように行われるので、仕込み各単量体重量比がほぼ生成共重合体の共重合組成重量比となる。 Examples of the carboxyl group-containing unsaturated compound include monoalkyl esters such as methyl, ethyl, propyl, isopropyl, n-butyl and isobutyl of maleic acid or fumaric acid, and methyl, ethyl, propyl, isopropyl and n- of itaconic acid or citraconic acid. Examples thereof include monoalkyl esters such as butyl and isobutyl, and preferably, maleic acid mono-n-butyl ester, fumaric acid monoethyl ester, and fumaric acid mono n-butyl ester are used. These carboxyl group-containing unsaturated compounds are used in a copolymerization ratio such that they occupy about 0.5 to 10% by weight, preferably about 1 to 7% by weight of the carboxyl group-containing acrylic elastomer, and at a lower copolymerization ratio. Insufficient vulcanization results in deterioration of the compression set, while increasing the copolymerization ratio makes scorch easier. Since the copolymerization reaction is carried out so that the polymerization conversion rate is 90% or more, the weight ratio of each charged monomer is substantially the copolymerization composition weight ratio of the produced copolymer.

カルボキシル基含有アクリルエラストマー中には、さらに他の共重合可能なエチレン性不飽和単量体、例えばスチレン、α-メチルスチレン、ビニルトルエン、ビニルナフタレン、アクリロニトリル、メタクリロニトリル、アクリル酸アミド、酢酸ビニル、シクロヘキシルアクリレート、ベンジルアクリレート、エチレン、プロピレン、ピペリレン、ブタジエン、イソプレン、ペンタジエン等を、約50重量%以下の割合で共重合させることができる。 Among the carboxyl group-containing acrylic elastomers are still other copolymerizable ethylenically unsaturated monomers such as styrene, α-methylstyrene, vinyltoluene, vinylnaphthalene, acrylonitrile, methacrylonitrile, acrylic acid amide, vinyl acetate. , Cyclohexyl acrylate, benzyl acrylate, ethylene, propylene, piperylene, butadiene, isoprene, pentadiene and the like can be copolymerized at a ratio of about 50% by weight or less.

さらに、必要に応じて、混練加工性や押出加工性などを改善する目的で、多官能性(メタ)アクリレートまたはオリゴマー、例えばエチレングリコール、プロピレングリコール、1,4-ブタンジオール、1,6-ヘキサンジオール、1,9-ノナンジオール等のアルキレングリコールのジ(メタ)アクリレート、ネオペンチルグリコール、テトラエチレングリコール、トリプロピレングリコール、ポリプロピレングリコール等のジ(メタ)アクリレート、ビスフェノールA・エチレンオキサイド付加物ジアクリレート、ジメチロールトリシクロデカンジアクリレート、グリセリンメタクリレートアクリレート、3-アクリロイルオキシグリセリンモノメタクリレート等をさらに共重合して用いることもできる。ここで、(メタ)アクリレートは、アクリレートまたはメタクリレートを指している。 Further, if necessary, polyfunctional (meth) acrylates or oligomers such as ethylene glycol, propylene glycol, 1,4-butanediol, and 1,6-hexane are used for the purpose of improving kneading processability and extrusion processability. Di (meth) acrylate of alkylene glycol such as diol and 1,9-nonanediol, di (meth) acrylate of alkylene glycol such as neopentyl glycol, tetraethylene glycol, tripropylene glycol and polypropylene glycol, bisphenol A / ethylene oxide adduct diacrylate , Dimethyloltricyclodecanediacrylate, glycerin methacrylate acrylate, 3-acryloyloxyglycerin monomethacrylate and the like can be further copolymerized and used. Here, (meth) acrylate refers to acrylate or methacrylate.

加硫剤としてのカルバミン酸エステル化合物は、カルボキシル基含有アクリルエラストマー100重量部当り、約0.1〜10重量部、好ましくは約0.5〜5重量部の割合で用いられる。この加硫剤の使用割合がこれよりも少ないと、加硫が不十分となり、引張強さ、圧縮永久歪などの点で十分な物性が得られない。一方、これよりも多い割合で用いられると、破断時伸びの低下や圧縮永久歪の悪化を招くようになる。 The carbamic acid ester compound as a vulcanizing agent is used at a ratio of about 0.1 to 10 parts by weight, preferably about 0.5 to 5 parts by weight, per 100 parts by weight of the carboxyl group-containing acrylic elastomer. If the proportion of this vulcanizing agent used is less than this, vulcanization becomes insufficient, and sufficient physical properties cannot be obtained in terms of tensile strength, compression set, and the like. On the other hand, if it is used in a larger proportion than this, the elongation at break will decrease and the compression set will worsen.

カルバミン酸エステル化合物加硫剤には、塩基性加硫促進剤を併用することもできる。塩基性加硫促進剤としては、グアニジン化合物あるいは1,8-ジアザビシクロ〔5.4.0〕ウンデセン-7、1,5-ジアザビシクロ〔4.3.0〕ノネン-5等のジアザビシクロアルケン化合物またはその有機酸塩、無機酸塩が用いられ、好ましくはその添加効果がより高いといった観点から、1,8-ジアザビシクロ〔5.4.0〕ウンデセン-7が用いられる。また、1,8-ジアザビシクロ〔5.4.0〕ウンデセン-7とシリカとの混合物を用いることもでき、実際にはSafic Alcan社製品Vulcofac ACT55等が用いられる。 A basic vulcanization accelerator can also be used in combination with the carbamic acid ester compound vulcanizing agent. Examples of the basic sulfide accelerator include guanidine compounds or diazabicycloalkene compounds such as 1,8-diazabicyclo [5.4.0] undecene-7 and 1,5-diazabicyclo [4.3.0] nonene-5, or organic acids thereof. Salts and inorganic acid salts are used, and 1,8-diazabicyclo [5.4.0] undecene-7 is used from the viewpoint that the addition effect thereof is preferably higher. A mixture of 1,8-diazabicyclo [5.4.0] undecene-7 and silica can also be used, and in practice, Safic Alcan's Vulcofac ACT55 and the like are used.

ジアザビシクロアルケン化合物の有機酸塩または無機酸塩を形成する化合物としては、塩酸、硫酸、カルボン酸、スルホン酸、フェノール等が挙げられる。カルボン酸としては、例えばオクチル酸、オレイン酸、ギ酸、オルソフタル酸、アジピン酸等が、またスルホン酸としては、ベンゼンスルホン酸、トルエンスルホン酸、ドデシルベンゼンスルホン酸、ナフタレンスルホン酸等が挙げられる。これらは単独または二種以上を併用することができる。 Examples of the compound forming an organic acid salt or an inorganic acid salt of the diazabicycloalkene compound include hydrochloric acid, sulfuric acid, carboxylic acid, sulfonic acid, phenol and the like. Examples of the carboxylic acid include octyl acid, oleic acid, formic acid, orthophthalic acid, adipic acid and the like, and examples of the sulfonic acid include benzenesulfonic acid, toluenesulfonic acid, dodecylbenzenesulfonic acid and naphthalenesulfonic acid. These can be used alone or in combination of two or more.

グアニジン化合物としては、グアニジンまたはその置換体、例えばアミノグアニジン、1,1,3,3-テトラメチルグアニジン、n-ドデシルグアニジン、メチロールグアニジン、ジメチロールグアニジン、1-フェニルグアニジン、1,3-ジフェニルグアニジン、1,3-ジ-o-トリルグアニジン、トリフェニルグアニジン、1-ベンジル-2,3-ジメチルグアニジン、シアノグアニジン等が用いられ、この他1,6-グアニジノヘキサン、グアニル尿素、ビグアニド、1-o-トリルビグアニド等も用いられる。 Examples of the guanidine compound include guanidine or a substitute thereof, for example, aminoguanidine, 1,1,3,3-tetramethylguanidine, n-dodecylguanidine, methylolguanidine, dimethylolguanidine, 1-phenylguanidine, 1,3-diphenylguanidine. , 1,3-di-o-tolylguanidine, triphenylguanidine, 1-benzyl-2,3-dimethylguanidine, cyanoguanidine, etc. are used, and 1,6-guanidinohexane, guanylurea, biguanide, 1- o-Trillubiguanide etc. are also used.

塩基性加硫促進剤としてのグアニジン化合物は、カルボキシル基含有アクリルゴム100重量部当り約0.1〜10重量部、好ましくは約0.3〜6重量部の割合で用いられ、前記ジアザビシクロアルケン化合物は約0.01〜2重量部、好ましくは約0.05〜1.0重量部の割合で用いられる。また、ジアザビシクロアルケン化合物の有機酸塩または無機酸塩は、カルボキシル基含有アクリルゴム100重量部当り約0.1〜5重量部、好ましくは約0.2〜2重量部の割合で用いられる。塩基性加硫促進剤の添加割合がこれより多い割合で用いられると、スコーチが短くなり好ましくない。 The guanidine compound as a basic sulfide accelerator is used in a proportion of about 0.1 to 10 parts by weight, preferably about 0.3 to 6 parts by weight per 100 parts by weight of the carboxyl group-containing acrylic rubber, and the diazabicycloalkene compound is about. It is used in a proportion of 0.01 to 2 parts by weight, preferably about 0.05 to 1.0 parts by weight. The organic acid salt or inorganic acid salt of the diazabicycloalkene compound is used in a proportion of about 0.1 to 5 parts by weight, preferably about 0.2 to 2 parts by weight, per 100 parts by weight of the carboxyl group-containing acrylic rubber. If the addition ratio of the basic vulcanization accelerator is higher than this, the scorch becomes short, which is not preferable.

アクリルゴム組成物の調製は、カルボキシル基含有アクリルゴムおよびゴムの配合剤等として一般に用いられているカーボンブラック、シリカ等の無機充填剤、滑剤、老化防止剤、その他必要な配合剤をバンバリーミキサ等の密閉型混練機で混練した後、加硫剤および加硫促進剤を加え、オープンロールを用いて混合することにより行われる。調製されたアクリルゴム組成物は、一般に約150〜200℃、約1〜60分間のプレス加硫(一次加硫)によって加硫され、必要に応じて約150〜200℃、約1〜10時間のオーブン加硫(二次加硫)が行われる。 Acrylic rubber compositions are prepared by using inorganic fillers such as carbon black and silica, which are generally used as compounding agents for carboxyl group-containing acrylic rubber and rubber, lubricants, antiaging agents, and other necessary compounding agents such as Banbury mixer. After kneading with the closed type kneader, a vulcanizing agent and a vulcanization accelerator are added, and the mixture is mixed using an open roll. The prepared acrylic rubber composition is generally vulcanized by press vulcanization (primary vulcanization) at about 150 to 200 ° C. for about 1 to 60 minutes, and if necessary, about 150 to 200 ° C. for about 1 to 10 hours. Oven vulcanization (secondary vulcanization) is performed.

次に、実施例について本発明を説明する。 Next, the present invention will be described with respect to Examples.

実施例1
容量200mlのナスフラスコに、インドリルメタノール(東京化成工業製品)11.00g(74.7ミリモル)およびメチルエチルケトン24gを仕込み、25℃の水浴中で攪拌させることにより溶解させた後、ジラウリン酸ジブチルスズ(富士フイルム和光純薬製品)144mg(0.228ミリモル)を溶解させたメチルエチルケトン溶液2gを加え、続いてヘキサメチレンジイソシアネート(東京化成工業製品)6.00g(35.6ミリモル)のメチルエチルケトン溶液24gを2〜3回に分けて滴下し、5分間放置した。
Example 1
11.00 g (74.7 mmol) of indrill methanol (Tokyo Kasei Kogyo product) and 24 g of methyl ethyl ketone were placed in a 200 ml eggplant flask and dissolved by stirring in a water bath at 25 ° C. Then dibutyltin dilaurate (Fujifilm sum). 2 g of a methyl ethyl ketone solution in which 144 mg (0.228 mmol) of photopure drug product was dissolved was added, and then 24 g of a methyl ethyl ketone solution of 6.00 g (35.6 mmol) of hexamethylene diisocyanate (Tokyo Kasei Kogyo product) was added dropwise in 2 to 3 portions. , Left for 5 minutes.

反応終了後、減圧下において室温下にて5時間乾燥し、薄褐色の粗製粉末状固体〔カルバミン酸エステル化合物A〕17.24gを得た。

Figure 0006781863
After completion of the reaction, the mixture was dried under reduced pressure at room temperature for 5 hours to obtain 17.24 g of a light brown crude powdery solid [carbamic acid ester compound A].
Figure 0006781863

得られた固体は、1H NMR(Aceton-d6)およびFT-IRを用いてその構造を同定した。

Figure 0006781863
1H NMR:(a) 7.7ppm (d 2H)
(b) 7.1ppm (t 2H)
(c),(d) 7.4ppm (m 4H)
(e) 10.2ppm (s 2H)
(f) 7.0ppm (t 2H)
(g) 5.3ppm (s 4H)
(h) 6.1ppm (s 2H)
(i) 3.1ppm (q 4H)
(j) 1.5ppm (m 4H)
(k) 1.3ppm (m 4H)
FT-IR:3385cm-1:第2級複素芳香族アミンのN-H伸縮振動
3324cm-1:ウレタン結合由来のN-H伸縮振動
1686cm-1:ウレタン結合由来のC=O伸縮振動 The structure of the obtained solid was identified using 1 H NMR (Aceton-d 6 ) and FT-IR.
Figure 0006781863
1 H NMR: (a) 7.7ppm (d 2H)
(b) 7.1ppm (t 2H)
(c), (d) 7.4ppm (m 4H)
(e) 10.2ppm (s 2H)
(f) 7.0ppm (t 2H)
(g) 5.3ppm (s 4H)
(h) 6.1ppm (s 2H)
(i) 3.1ppm (q 4H)
(j) 1.5ppm (m 4H)
(k) 1.3ppm (m 4H)
FT-IR: 3385cm -1 : NH expansion and contraction vibration of secondary complex aromatic amine
3324cm -1 : NH expansion and contraction vibration derived from urethane bond
1686cm -1 : C = O expansion and contraction vibration derived from urethane bond

実施例2
容量50mlのナスフラスコに、N-メチル-2-ヒドロキシメチルピロール(東京化成工業製品)6.23g(56.1ミリモル)を仕込み、ジラウリン酸ジブチルスズ 108mg(0.171ミリモル)を溶解させたメチルエチルケトン溶液2gを加え、続いてヘキサメチレンジイソシアネート 4.50g(26.7ミリモル)を溶解させたメチルエチルケトン溶液6gを滴下し、25℃の水浴中で1.5時間攪拌した。
Example 2
To a 50 ml eggplant flask, 6.23 g (56.1 mmol) of N-methyl-2-hydroxymethylpyrrole (Tokyo Kasei Kogyo product) was charged, and 2 g of a methylethylketone solution in which 108 mg (0.171 mmol) of dibutyltin dilaurate was dissolved was added, followed by 6 g of a methyl ethyl ketone solution in which 4.50 g (26.7 mmol) of hexamethylene diisocyanate was dissolved was added dropwise, and the mixture was stirred in a water bath at 25 ° C. for 1.5 hours.

反応終了後、減圧下において室温にて8時間乾燥し、薄褐色の粉末状固体〔カルバミン酸エステル化合物B〕10.79g(収率99%)を得た。

Figure 0006781863
After completion of the reaction, the mixture was dried under reduced pressure at room temperature for 8 hours to obtain 10.79 g (yield 99%) of a light brown powdery solid [carbamic acid ester compound B].
Figure 0006781863

得られた固体は、1H NMRおよびFT-IRを用いてその構造を同定した。

Figure 0006781863
1H NMR:(a) 3.6ppm (s 6H)
(b) 6.6ppm (t 2H)
(c) 6.2ppm (q 2H)
(d) 6.1ppm (t 2H)
(e) 5.0ppm (s 4H)
(f) 6.6ppm (s 2H)
(g) 3.1ppm (m 4H)
(h) 1.5ppm (m 4H)
(i) 1.3ppm (m 4H)
FT-IR:3325cm-1:ウレタン結合由来のN-H伸縮振動
1679cm-1:ウレタン結合由来のC=O伸縮振動 The structure of the obtained solid was identified using 1 H NMR and FT-IR.
Figure 0006781863
1 H NMR: (a) 3.6ppm (s 6H)
(b) 6.6ppm (t 2H)
(c) 6.2ppm (q 2H)
(d) 6.1ppm (t 2H)
(e) 5.0ppm (s 4H)
(f) 6.6ppm (s 2H)
(g) 3.1ppm (m 4H)
(h) 1.5ppm (m 4H)
(i) 1.3ppm (m 4H)
FT-IR: 3325cm -1 : NH expansion and contraction vibration derived from urethane bond
1679cm -1 : C = O expansion and contraction vibration derived from urethane bond

実施例3
容量100mlの二口ナスフラスコに、1,1-ジフェニルエタノール(東京化成工業製品)11.16g(56.25ミリモル)を仕込み、ジラウリン酸ジブチルスズ 360mg(0.570ミリモル)を溶解させたメチルエチルケトン溶液2gを加えた後、ヘキサメチレンジイソシアネート4.50g(26.7ミリモル)を溶解させたメチルエチルケトン溶液4gを滴下し、反応器を80℃に加温して5.5時間攪拌した。
Example 3
11.16 g (56.25 mmol) of 1,1-diphenylethanol (Tokyo Kasei Kogyo product) was charged into a two-necked eggplant flask with a capacity of 100 ml, and 2 g of a methylethylketone solution in which 360 mg (0.570 mmol) of dibutyltin dilaurate was dissolved was added. 4 g of a methyl ethyl ketone solution in which 4.50 g (26.7 mmol) of hexamethylene diisocyanate was dissolved was added dropwise, and the reactor was heated to 80 ° C. and stirred for 5.5 hours.

反応終了後、不溶部をろ過してn-ヘキサンで洗い、ろ過物を減圧下において室温にて8時間乾燥し、白色の粉末状固体〔カルバミン酸エステル化合物C〕14.25g(収率94%)を得た。

Figure 0006781863
After completion of the reaction, the insoluble part was filtered, washed with n-hexane, and the filtrate was dried under reduced pressure at room temperature for 8 hours to obtain a white powdery solid [carbamic acid ester compound C] 14.25 g (yield 94%). Got
Figure 0006781863

得られた固体は、1H NMRおよびFT-IRを用いてその構造を同定した。

Figure 0006781863
1H NMR:(a),(b),(c) 7.2-7.3ppm (m 20H)
(d) 2.2ppm (s 6H)
(c),(d) 7.4ppm (m 4H)
(e) 4.8ppm (s 2H)
(f) 3.0ppm (m 4H)
(g) 1.4ppm (m 4H)
(h) 1.2ppm (m 4H)
FT-IR:3281cm-1:ウレタン結合由来のN-H伸縮振動
1690cm-1:ウレタン結合由来のC=O伸縮振動 The structure of the obtained solid was identified using 1 H NMR and FT-IR.
Figure 0006781863
1 1 H NMR: (a), (b), (c) 7.2-7.3ppm (m 20H)
(d) 2.2ppm (s 6H)
(c), (d) 7.4ppm (m 4H)
(e) 4.8ppm (s 2H)
(f) 3.0ppm (m 4H)
(g) 1.4ppm (m 4H)
(h) 1.2ppm (m 4H)
FT-IR: 3281cm -1 : NH expansion and contraction vibration derived from urethane bond
1690cm -1 : C = O expansion and contraction vibration derived from urethane bond

参考例
容量50mlのナスフラスコに、α,α,4-トリメチル-ジメチルベンジルアルコール(東京化成工業製品)8.43g(56.1ミリモル)、ジラウリン酸ジブチルスズ 360mg(0.570ミリモル)およびヘキサメチレンジイソシアネート 4.50g(26.7ミリモル)を仕込み、反応器を80℃に加温し、2.5時間攪拌した。
Reference example In a 50 ml capacity eggplant flask, 8.43 g (56.1 mmol) of α, α, 4-trimethyl-dimethylbenzyl alcohol (Tokyo Chemical Industry product), 360 mg (0.570 mmol) of dibutyltin dilaurate and 4.50 g (26.7 mmol) of hexamethylene diisocyanate. ) Was charged, the reactor was heated to 80 ° C., and the mixture was stirred for 2.5 hours.

反応終了後冷却し、白色の粉末状固体〔カルバミン酸エステル化合物D〕12.06g(収率91%)を得た。

Figure 0006781863
After completion of the reaction, the mixture was cooled to obtain 12.06 g (yield 91%) of a white powdery solid [carbamic acid ester compound D].
Figure 0006781863

得られた固体は、1H NMRおよびFT-IRを用いてその構造を同定した。

Figure 0006781863
1H NMR:(a) 2.3ppm (s 6H)
(b) 7.1ppm (t 2H)
(c) 7.2ppm (m 4H)
(d) 1.7ppm (s 12H)
(e) 4.7ppm (m 2H)
(f) 3.0ppm (m 4H)
(g) 1.4ppm (m 4H)
(h) 1.3ppm (m 4H)
FT-IR:3307cm-1:ウレタン結合由来のN-H伸縮振動
1687cm-1:ウレタン結合由来のC=O伸縮振動 The structure of the obtained solid was identified using 1 H NMR and FT-IR.
Figure 0006781863
1 H NMR: (a) 2.3ppm (s 6H)
(b) 7.1ppm (t 2H)
(c) 7.2ppm (m 4H)
(d) 1.7ppm (s 12H)
(e) 4.7ppm (m 2H)
(f) 3.0ppm (m 4H)
(g) 1.4ppm (m 4H)
(h) 1.3ppm (m 4H)
FT-IR: 3307cm -1 : NH expansion and contraction vibration derived from urethane bond
1687cm -1 : C = O expansion and contraction vibration derived from urethane bond

実施例
カルボキシル基含有アクリルゴム 100重量部
(ユニマテック製品ノックスタイトPA-522HF)
FEFカーボンブラック(東海カーボン製品シーストG-SO) 55 〃
ステアリン酸(ミヨシ油脂製品DTST) 1 〃
4,4′-(α,α-ジメチルベンジル)ジフェニルアミン 2 〃
(大内新興化学工業製品ノクラックCD)
カルバミン酸エステル化合物A 1.7 〃
1,3-ジ-o-トリルグアニジン 2 〃
(大内新興化学工業製品ノクセラーDT)
Example 4
Carboxylic group-containing acrylic rubber 100 parts by weight
(Unimatec product Knox tight PA-522HF)
FEF Carbon Black (Tokai Carbon Product Seest G-SO) 55 〃
Stearic acid (Miyoshi Oil & Fat Product DTST) 1 〃
4,4'-(α, α-dimethylbenzyl) diphenylamine 2 〃
(Ouchi Shinko Chemical Industry Product Nocrack CD)
Carbamic acid ester compound A 1.7 〃
1,3-di-o-trill guanidine 2 〃
(Ouchi Shinko Chemical Industry Product Noxeller DT)

以上の各成分の内、加硫剤および加硫促進剤を除く各成分をバンバリーミキサで混練した後、オープンロールを用いて加硫剤および加硫促進剤の添加が行われた。このようにして調製されたアクリルゴム組成物は、180℃で8分間のプレス加硫(一次加硫)および175℃、4時間のオーブン加硫(二次加硫)によって加硫された。 Of the above components, each component excluding the vulcanizing agent and the vulcanization accelerator was kneaded with a Banbury mixer, and then the vulcanizing agent and the vulcanization accelerator were added using an open roll. The acrylic rubber composition thus prepared was vulcanized by press vulcanization (primary vulcanization) at 180 ° C. for 8 minutes and oven vulcanization (secondary vulcanization) at 175 ° C. for 4 hours.

アクリルゴム組成物である生地の加硫特性および加硫物物性の測定が、次のようにして行われた。
ムーニー・スコーチ試験:ISO 289に対応するJIS K6300-1準拠
(125℃)
t5の値(単位:分)は長い程成形時の生地ヤ
ケの懸念が少なく、ヤケに起因する不良が
少ない
一般には、t5の値が10分以上であれば、射
出成形、圧縮成形、押出成形でのヤケに起
因する不良が少なくなる
MLmin:ムーニー粘度の最低値であり、加工
性の指標となる
加硫試験:ISO 6502に対応するJIS K6300-2準拠(180℃、12分間)
東洋精機製作所製ロータレス・レオメーターRLR-3使用
ML:最小トルク
MH:最大トルク
tc10:加硫トルクがML+(MH-ML)×0.1に達するまでに要す
る時間
tc90:加硫トルクがML+(MH-ML)×0.9に達するまでに要す
る時間
加硫速度の評価は、加硫試験のtc10、tc90およびME(MH-
ML)で判断でき、tc10およびtc90が短くかつMEが大きい程
加硫速度は速い
常態値:ISO 37に対応するJIS K6251、ISO 7619-1に対応するJIS K62
53準拠
圧縮永久歪:ISO 815-1に対応するJIS K6262準拠(175℃、70時間)
空気加熱老化試験:ISO 188に対応するJIS K6257準拠(175℃、70時
間)常態値変化を測定
The vulcanization properties and physical properties of the vulcanized material of the dough, which is an acrylic rubber composition, were measured as follows.
Mooney Scorch Test: JIS K 6300-1 compliant for ISO 289
(125 ℃)
The longer the value of t5 (unit: minutes), the more the dough at the time of molding.
There is little concern about burns, and defects caused by burns
Few
In general, if the value of t5 is 10 minutes or more, it will fire
Caused by discoloration in ejection molding, compression molding, and extrusion molding
Fewer defects caused
ML min : The lowest value of Mooney viscosity, processed
Vulcanization test as an index of sex: JIS K 6300-2 compliant (180 ° C, 12 minutes) corresponding to ISO 6502
Uses Toyo Seiki Seisakusho's rotary rheometer RLR-3
ML: Minimum torque
MH: Maximum torque
tc10: It takes time for the vulcanization torque to reach ML + (MH-ML) x 0.1.
Time
tc90: It takes time for the vulcanization torque to reach ML + (MH-ML) x 0.9.
Time
Evaluation of vulcanization rate is based on vulcanization tests tc10, tc90 and ME (MH-
Judgment by ML), the shorter tc10 and tc90 and the larger ME
Vulcanization rate is fast Normal value: JIS K6251 corresponding to ISO 37, JIS K62 corresponding to ISO 7619-1
53 compliant compression set: JIS K 6262 compliant (175 ° C, 70 hours) corresponding to ISO 815-1
Air heating aging test: JIS K 6257 compliant (175 ° C, 70 o'clock) corresponding to ISO 188
Between) Measure changes in normal values

実施例
実施例において、カルバミン酸エステル化合物Aの代わりに、カルバミン酸エステル化合物B1.5重量部が用いられた。
Example 5
In Example 4 , 1.5 parts by weight of the carbamic acid ester compound B was used instead of the carbamic acid ester compound A.

実施例
実施例において、カルバミン酸エステル化合物Aの代わりに、カルバミン酸エステル化合物C2.1重量部が用いられた。
Example 6
In Example 4 , 2.1 parts by weight of the carbamic acid ester compound C was used instead of the carbamic acid ester compound A.

実施例
実施例において、カルバミン酸エステル化合物Aの代わりに、カルバミン酸エステル化合物D1.8重量部が用いられた。
Example 7
In Example 4 , 1.8 parts by weight of the carbamic acid ester compound D was used instead of the carbamic acid ester compound A.

比較例1
実施例において、カルバミン酸エステル化合物Aの代わりに、脂肪族アミン加硫剤(ユニマテック製品ケミノックスAC-6F)0.6重量部が用いられた。
Comparative Example 1
In Example 4 , 0.6 parts by weight of an aliphatic amine vulcanizer (Unimatec product Cheminox AC-6F) was used instead of the carbamic acid ester compound A.

比較例2
実施例において、カルバミン酸エステル化合物Aの代わりに、芳香族ジアミン加硫剤(ユニマテック製品ケミノックスCLP5000)1.2重量部が用いられた。
Comparative Example 2
In Example 4 , 1.2 parts by weight of an aromatic diamine vulcanizer (Unimatec product Cheminox CLP5000) was used instead of the carbamic acid ester compound A.

比較例3
比較例1において、さらに加硫遅延剤としてステアリルアミン(花王製品ファーミン80S)1重量部が用いられた。
Comparative Example 3
In Comparative Example 1, 1 part by weight of stearylamine (Kao product Fermin 80S) was further used as a vulcanization retarder.

実施例
実施例において、1,3-ジ-o-トリルグアニジンの代わりに、加硫促進剤として1,8-ジアザビシクロ〔5.4.0〕ウンデセン-7二塩基酸塩−アルファモスシリカ(重量比70:30)混合物(Safic Alcan社製品Vulcofac ACT55) 1重量部が用いられた。
Example 8
In Example 6 , instead of 1,3-di-o-tolylguanidine, 1,8-diazabicyclo [5.4.0] undecene-7 dibasate-alphamos silica (weight ratio 70:) as a vulcanization accelerator. 30) Mixture (Vulcofac ACT55, manufactured by Safic Alcan) 1 part by weight was used.

実施例
実施例において、1,3-ジ-o-トリルグアニジンの代わりに、加硫促進剤として1,8-ジアザビシクロ〔5.4.0〕ウンデセン-7二塩基酸塩−アルファモスシリカ(重量比70:30)混合物(Vulcofac ACT55) 1重量部が用いられた。
Example 9
In Example 7 , instead of 1,3-di-o-tolylguanidine, 1,8-diazabicyclo [5.4.0] undecene-7 dibasate-alphamos silica (weight ratio 70:) as a vulcanization accelerator. 30) 1 part by weight of the mixture (Vulcofac ACT55) was used.

比較例4
比較例1において、1,3-ジ-o-トリルグアニジンの代わりに、加硫促進剤として1,8-ジアザビシクロ〔5.4.0〕ウンデセン-7二塩基酸塩−アルファモスシリカ(重量比70:30)混合物(Vulcofac ACT55) 1重量部が用いられた。
Comparative Example 4
In Comparative Example 1, instead of 1,3-di-o-tolylguanidine, 1,8-diazabicyclo [5.4.0] undecene-7 dibasic acid salt-alpha moss silica (weight ratio 70:) was used as a vulcanization accelerator. 30) 1 part by weight of the mixture (Vulcofac ACT55) was used.

比較例5
比較例3において、1,3-ジ-o-トリルグアニジンの代わりに、加硫促進剤として1,8-ジアザビシクロ〔5.4.0〕ウンデセン-7二塩基酸塩−アルファモスシリカ(重量比70:30)混合物(Vulcofac ACT55) 1重量部が用いられた。
Comparative Example 5
In Comparative Example 3, instead of 1,3-di-o-tolylguanidine, 1,8-diazabicyclo [5.4.0] undecene-7 dibasate-alphamos silica (weight ratio 70:) was used as a vulcanization accelerator. 30) 1 part by weight of the mixture (Vulcofac ACT55) was used.

以上の実施例4〜9および比較例1〜5で得られた結果は、次の表1に示される。
表1
実施例 比較例 実施例 比較例
測定項目
ムーニー・スコーチ試験
MLmin (pts) 33 32 29 29 32 32 32 29 28 36 36
t5 (分) 7.9 8.0 18.6 26.3 6.8 13.5 8.1 17.4 18.3 5.4 6.2
加硫試験
tc10 (分) 0.60 0.62 0.89 1.12 0.58 1.19 0.69 0.99 1.05 0.51 0.59
tc90 (分) 4.69 6.34 6.09 6.58 4.26 8.25 6.54 6.94 7.14 5.08 6.46
ML (N・m) 0.14 0.13 0.12 0.12 0.13 0.13 0.13 0.13 0.12 0.14 0.14
MH (N・m) 0.71 0.69 0.76 0.71 0.78 0.35 0.64 0.78 0.75 0.82 0.67
ME(MH - ML) (N・m) 0.57 0.56 0.64 0.59 0.65 0.22 0.51 0.65 0.63 0.68 0.53
常態値
硬度 (デュロA) 63 66 65 61 61 67 63 66 65 61 64
100%モジュラス(MPa) 4.1 5.0 4.9 4.1 3.7 4.8 3.5 5.2 4.7 4.3 4.0
破断強度 (MPa) 11.2 12.0 10.8 10.5 11.4 11.9 10.8 11.5 11.4 11.9 11.3
破断時伸び (%) 250 210 220 250 240 220 270 200 210 210 230
圧縮永久歪
175℃、70時間 (%) 14 18 16 16 12 15 23 19 16 13 20
175℃、70時間後の常態値変化
硬度 (デュロA) +2 +2 +2 +4 +2 +2 -3 +1 +1 +3 +2
100%モジュラス(MPa) -23 -20 -15 -11 -12 -5 -16 -14 -21 -18 -20
破断強度 (MPa) -18 -12 -9 -10 -16 -9 -18 -15 -17 -19 -18
破断時伸び (%) +20 +14 +18 +4 +13 0 +7 +20 +14 +19 +17
The results obtained in Examples 4 to 9 and Comparative Examples 1 to 5 above are shown in Table 1 below.
Table 1
Example Comparative Example Example Comparative Example
Measurement items 4 5 6 7 1 2 3 8 9 4 5
Mooney Scorch Exam
ML min (pts) 33 32 29 29 32 32 32 29 28 36 36
t5 (minutes) 7.9 8.0 18.6 26.3 6.8 13.5 8.1 17.4 18.3 5.4 6.2
Vulcanization test
tc10 (minutes) 0.60 0.62 0.89 1.12 0.58 1.19 0.69 0.99 1.05 0.51 0.59
tc90 (minutes) 4.69 6.34 6.09 6.58 4.26 8.25 6.54 6.94 7.14 5.08 6.46
ML (N ・ m) 0.14 0.13 0.12 0.12 0.13 0.13 0.13 0.13 0.12 0.14 0.14
MH (N ・ m) 0.71 0.69 0.76 0.71 0.78 0.35 0.64 0.78 0.75 0.82 0.67
ME (MH --ML) (N ・ m) 0.57 0.56 0.64 0.59 0.65 0.22 0.51 0.65 0.63 0.68 0.53
Normal value Hardness (Duro A) 63 66 65 61 61 67 63 66 65 61 64
100% Modulus (MPa) 4.1 5.0 4.9 4.1 3.7 4.8 3.5 5.2 4.7 4.3 4.0
Breaking strength (MPa) 11.2 12.0 10.8 10.5 11.4 11.9 10.8 11.5 11.4 11.9 11.3
Elongation at break (%) 250 210 220 250 240 220 270 200 210 210 230
Compression permanent strain
175 ℃, 70 hours (%) 14 18 16 16 12 15 23 19 16 13 20
Normal value change after 70 hours at 175 ℃ Hardness (Duro A) +2 +2 +2 +4 +2 +2 -3 +1 +1 +3 +2
100% Modulus (MPa) -23 -20 -15 -11 -12 -5 -16 -14 -21 -18 -20
Breaking strength (MPa) -18 -12 -9 -10 -16 -9 -18 -15 -17 -19 -18
Elongation at break (%) +20 +14 +18 +4 +13 0 +7 +20 +14 +19 +17

実施例10
実施例において、1,3-ジ-o-トリルグアニジンの代わりに、加硫促進剤として1,8-ジアザビシクロ〔5.4.0〕ウンデセン-7(ランクセス社製品Rhenogran XLA-60) 1重量部が用いられた。
Example 10
In Example 5 , instead of 1,3-di-o-tolylguanidine, 1 part by weight of 1,8-diazabicyclo [5.4.0] undecene-7 (Lanxess product Rhenogran XLA-60) was used as a vulcanization accelerator. Was used.

実施例11
実施例において、1,3-ジ-o-トリルグアニジンの代わりに、加硫促進剤として1,8-ジアザビシクロ〔5.4.0〕ウンデセン-7(Rhenogran XLA-60) 1重量部が用いられた。
Example 11
In Example 6 , 1 part by weight of 1,8-diazabicyclo [5.4.0] undecene-7 (Rhenogran XLA-60) was used as a vulcanization accelerator instead of 1,3-di-o-tolylguanidine. ..

実施例12
実施例において、1,3-ジ-o-トリルグアニジンの代わりに、加硫促進剤として1,8-ジアザビシクロ〔5.4.0〕ウンデセン-7(Rhenogran XLA-60) 1重量部が用いられた。
Example 12
In Example 7 , 1 part by weight of 1,8-diazabicyclo [5.4.0] undecene-7 (Rhenogran XLA-60) was used as a vulcanization accelerator instead of 1,3-di-o-tolylguanidine. ..

比較例6
比較例1において、1,3-ジ-o-トリルグアニジンの代わりに、加硫促進剤として1,8-ジアザビシクロ〔5.4.0〕ウンデセン-7(Rhenogran XLA-60) 1重量部が用いられた。
Comparative Example 6
In Comparative Example 1, 1 part by weight of 1,8-diazabicyclo [5.4.0] undecene-7 (Rhenogran XLA-60) was used as a vulcanization accelerator instead of 1,3-di-o-tolylguanidine. ..

比較例7
比較例3において、1,3-ジ-o-トリルグアニジンの代わりに、加硫促進剤として1,8-ジアザビシクロ〔5.4.0〕ウンデセン-7(Rhenogran XLA-60) 1重量部が用いられた。
Comparative Example 7
In Comparative Example 3, 1 part by weight of 1,8-diazabicyclo [5.4.0] undecene-7 (Rhenogran XLA-60) was used as a vulcanization accelerator instead of 1,3-di-o-tolylguanidine. ..

実施例13
実施例において、1,3-ジ-o-トリルグアニジンの代わりに、加硫促進剤として1,8-ジアザビシクロ〔5.4.0〕ウンデセン-7(サンアプロ製品DBU) 0.5重量部が用いられた。
Example 13
In Example 6 , 0.5 part by weight of 1,8-diazabicyclo [5.4.0] undecene-7 (San Apro product DBU) was used as a vulcanization accelerator instead of 1,3-di-o-tolylguanidine.

実施例14
実施例において、1,3-ジ-o-トリルグアニジンの代わりに、加硫促進剤として1,8-ジアザビシクロ〔5.4.0〕ウンデセン-7(DBU) 0.5重量部が用いられた。
Example 14
In Example 7 , 0.5 parts by weight of 1,8-diazabicyclo [5.4.0] undecene-7 (DBU) was used as the vulcanization accelerator instead of 1,3-di-o-tolylguanidine.

比較例8
比較例1において、1,3-ジ-o-トリルグアニジンの代わりに、加硫促進剤として1,8-ジアザビシクロ〔5.4.0〕ウンデセン-7(DBU) 0.5重量部が用いられた。
Comparative Example 8
In Comparative Example 1, 0.5 part by weight of 1,8-diazabicyclo [5.4.0] undecene-7 (DBU) was used as a vulcanization accelerator instead of 1,3-di-o-tolylguanidine.

比較例9
比較例3において、1,3-ジ-o-トリルグアニジンの代わりに、加硫促進剤として1,8-ジアザビシクロ〔5.4.0〕ウンデセン-7(DBU) 0.5重量部が用いられた。
Comparative Example 9
In Comparative Example 3, 0.5 part by weight of 1,8-diazabicyclo [5.4.0] undecene-7 (DBU) was used as a vulcanization accelerator instead of 1,3-di-o-tolylguanidine.

比較例10
実施例1において、FEFカーボンブラック量が60重量部に変更され、カルバミン酸エステル化合物Aの代りに、1.5重量部のHMDA-Fmocが用いられた。

Figure 0006781863
Comparative Example 10
In Example 1, the amount of FEF carbon black was changed to 60 parts by weight and 1.5 parts by weight of HMDA-Fmoc was used instead of carbamic acid ester compound A.
Figure 0006781863

比較例11
実施例1において、FEFカーボンブラック量が60重量部に変更され、カルバミン酸エステル化合物Aの代りに、1.5重量部のHMDA-Dmocが用いられた。

Figure 0006781863
Comparative Example 11
In Example 1, the amount of FEF carbon black was changed to 60 parts by weight and 1.5 parts by weight of HMDA-Dmoc was used instead of carbamic acid ester compound A.
Figure 0006781863

以上の実施例10〜14および比較例6〜11で得られた結果は、次の表2に示される。
表2
実施例 比較例 実施例 比較例
測定項目 10 11 12 13 14 10 11
ムーニー・スコーチ試験
MLmin (pts) 34 30 30 38 36 35 34 41 37 36 36
t5 (分) 9.3 24.6 25.2 6.0 7.8 18.0 23.3 4.0 5.2 >60 >60
加硫試験
tc10 (分) 0.83 1.24 1.30 0.65 0.70 1.08 1.20 0.36 0.47 2.74 1.65
tc90 (分) 7.39 7.39 7.52 6.31 7.25 6.33 6.62 3.53 4.79 9.20 8.92
ML (N・m) 0.13 0.12 0.12 0.14 0.14 0.13 0.13 0.15 0.14 0.16 0.15
MH (N・m) 0.70 0.70 0.67 0.77 0.63 0.82 0.81 0.88 0.69 0.41 0.32
ME(MH - ML) (N・m) 0.57 0.58 0.55 0.63 0.49 0.69 0.68 0.73 0.55 0.25 0.17
常態値
硬度 (デュロA) 66 65 64 61 62 69 66 65 66 65 62
100%モジュラス(MPa) 4.9 4.5 4.2 4.5 3.9 5.9 5.1 5.7 4.3 2.5 2.8
破断強度 (MPa) 10.8 11.0 10.3 11.7 11.3 11.7 11.4 12.3 11.6 9.2 8.9
破断時伸び (%) 200 230 220 220 230 190 200 180 220 310 340
圧縮永久歪
175℃、70時間 (%) 23 24 20 16 22 23 19 15 21 15 26
175℃、70時間後の常態値変化
硬度 (デュロA) +4 +0 +3 +4 +3 +4 +4 +0 +1 − −
100%モジュラス(MPa) -15 -21 -2 -20 -13 -29 -16 -30 -19 − −
破断強度 (MPa) -9 -18 -5 -19 -18 -17 -14 -17 -17 − −
破断時伸び (%) +15 +13 +18 +18 +17 +21 +10 +28 +9 − −
The results obtained in Examples 10 to 14 and Comparative Examples 6 to 11 above are shown in Table 2 below.
Table 2
Example Comparative Example Example Comparative Example
Measurement items 10 11 12 6 7 13 14 8 9 10 11
Mooney Scorch Exam
ML min (pts) 34 30 30 38 36 35 34 41 37 36 36
t5 (minutes) 9.3 24.6 25.2 6.0 7.8 18.0 23.3 4.0 5.2>60> 60
Vulcanization test
tc10 (minutes) 0.83 1.24 1.30 0.65 0.70 1.08 1.20 0.36 0.47 2.74 1.65
tc90 (minutes) 7.39 7.39 7.52 6.31 7.25 6.33 6.62 3.53 4.79 9.20 8.92
ML (N ・ m) 0.13 0.12 0.12 0.14 0.14 0.13 0.13 0.15 0.14 0.16 0.15
MH (N ・ m) 0.70 0.70 0.67 0.77 0.63 0.82 0.81 0.88 0.69 0.41 0.32
ME (MH --ML) (N ・ m) 0.57 0.58 0.55 0.63 0.49 0.69 0.68 0.73 0.55 0.25 0.17
Normal value Hardness (Duro A) 66 65 64 61 62 69 66 65 66 65 62
100% Modulus (MPa) 4.9 4.5 4.2 4.5 3.9 5.9 5.1 5.7 4.3 2.5 2.8
Breaking strength (MPa) 10.8 11.0 10.3 11.7 11.3 11.7 11.4 12.3 11.6 9.2 8.9
Elongation at break (%) 200 230 220 220 230 190 200 180 220 310 340
Compression permanent strain
175 ℃, 70 hours (%) 23 24 20 16 22 23 19 15 21 15 26
Normal value change after 70 hours at 175 ℃ Hardness (Duro A) +4 +0 +3 +4 +3 +4 +4 +0 +1 − −
100% Modulus (MPa) -15 -21 -2 -20 -13 -29 -16 -30 -19 − −
Breaking strength (MPa) -9 -18 -5 -19 -18 -17 -14 -17 -17 − −
Elongation at break (%) +15 +13 +18 +18 +17 +21 +10 +28 +9 − −

Claims (9)

一般式
Z-OCONH(CH2)nNHCOO-Z 〔I〕
ここでZは下記〔i〕、〔ii〕または〔iii〕であり、nは2〜10の整数である
Figure 0006781863
Figure 0006781863
Figure 0006781863
(ここで、R1は炭素数1〜5の低級アルキル基であり、R3は水素原子または炭素数1〜5の低級アルキル基であり、aは2である)で表わされるカルバミン酸エステル化合物。
General formula
Z-OCONH (CH 2 ) n NHCOO-Z [I]
Where Z is the following [i], [ii] or [iii], and n is an integer from 2 to 10.
Figure 0006781863
Figure 0006781863
Figure 0006781863
(Here, R 1 is a lower alkyl group having 1 to 5 carbon atoms, R 3 is a hydrogen atom or a lower alkyl group having 1 to 5 carbon atoms, and a is 2). ..
式〔I〕のnが6である請求項1記載のカルバミン酸エステル化合物。 The carbamic acid ester compound according to claim 1, wherein n of the formula [I] is 6. カルボキシル基含有アクリルゴムの加硫剤として用いられる請求項1記載のカルバミン酸エステル化合物。 The carbamic acid ester compound according to claim 1, which is used as a vulcanizing agent for a carboxyl group-containing acrylic rubber. カルボキシル基含有アクリルゴム100重量部に対して、加硫剤として、一般式
Z-OCONH(CH2)nNHCOO-Z 〔I〕
ここでZは下記〔i〕、〔ii〕または〔iii〕であり、nは2〜10の整数である
Figure 0006781863
Figure 0006781863
Figure 0006781863
(ここで、R1およびR2はそれぞれ独立に炭素数1〜5の低級アルキル基であり、R3は水素原子または炭素数1〜5の低級アルキル基であり、aは1または2である)で表わされるカルバミン酸エステル化合物を0.1〜10重量部配合してなるアクリルゴム組成物。
General formula as a vulcanizing agent for 100 parts by weight of carboxyl group-containing acrylic rubber
Z-OCONH (CH 2 ) n NHCOO-Z [I]
Where Z is the following [i], [ii] or [iii], and n is an integer from 2 to 10.
Figure 0006781863
Figure 0006781863
Figure 0006781863
(Here, R 1 and R 2 are independently lower alkyl groups with 1 to 5 carbon atoms, R 3 is a hydrogen atom or lower alkyl group with 1 to 5 carbon atoms, and a is 1 or 2. ) Is blended in 0.1 to 10 parts by weight of a carbamic acid ester compound.
さらにグアニジン化合物加硫促進剤が0.1〜10重量部配合された請求項4記載のアクリルゴム組成物。 The acrylic rubber composition according to claim 4, further comprising 0.1 to 10 parts by weight of a guanidine compound vulcanization accelerator. さらにジアザビシクロアルケン化合物加硫促進剤が0.01〜2重量部配合された請求項4記載のアクリルゴム組成物。 The acrylic rubber composition according to claim 4, further comprising 0.01 to 2 parts by weight of a diazabicycloalkene compound vulcanization accelerator. さらにジアザビシクロアルケン化合物の有機酸塩または無機酸塩加硫促進剤が0.1〜5重量部配合された請求項4記載のアクリルゴム組成物。 The acrylic rubber composition according to claim 4, further comprising 0.1 to 5 parts by weight of an organic acid salt or an inorganic acid salt vulcanization accelerator of a diazabicycloalkene compound. 請求項4記載のアクリルゴム組成物の型成形品である加硫成形品。 A vulcanized molded product which is a mold molded product of the acrylic rubber composition according to claim 4. 請求項4記載のアクリルゴム組成物の押出成形品である加硫成形品。 A vulcanized molded product which is an extruded product of the acrylic rubber composition according to claim 4.
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